/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.catalina.ha.session;

import java.beans.PropertyChangeListener;
import java.io.ByteArrayInputStream;
import java.io.IOException;

import org.apache.catalina.Container;
import org.apache.catalina.Lifecycle;
import org.apache.catalina.Loader;
import org.apache.catalina.ha.ClusterManager;
import org.apache.catalina.session.ManagerBase;
import org.apache.catalina.tribes.io.ReplicationStream;

/**
 * 
 * @author Filip Hanik
 * @version $Revision: 467222 $ $Date: 2006-10-24 11:17:11 +0800 (星期二, 24 十月
 *          2006) $
 */

public abstract class ClusterManagerBase extends ManagerBase implements
		Lifecycle, PropertyChangeListener, ClusterManager {

	public static ClassLoader[] getClassLoaders(Container container) {
		Loader loader = null;
		ClassLoader classLoader = null;
		if (container != null)
			loader = container.getLoader();
		if (loader != null)
			classLoader = loader.getClassLoader();
		else
			classLoader = Thread.currentThread().getContextClassLoader();
		if (classLoader == Thread.currentThread().getContextClassLoader()) {
			return new ClassLoader[] { classLoader };
		} else {
			return new ClassLoader[] { classLoader,
					Thread.currentThread().getContextClassLoader() };
		}
	}

	public ClassLoader[] getClassLoaders() {
		return getClassLoaders(container);
	}

	/**
	 * Open Stream and use correct ClassLoader (Container) Switch
	 * ThreadClassLoader
	 * 
	 * @param data
	 * @return The object input stream
	 * @throws IOException
	 */
	public ReplicationStream getReplicationStream(byte[] data)
			throws IOException {
		return getReplicationStream(data, 0, data.length);
	}

	public ReplicationStream getReplicationStream(byte[] data, int offset,
			int length) throws IOException {
		ByteArrayInputStream fis = new ByteArrayInputStream(data, offset,
				length);
		return new ReplicationStream(fis, getClassLoaders());
	}

}